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From: dvljrt@cs.umu.se (Joakim Rosqvist)
Newsgroups: comp.sys.amiga.emulations
Subject: Re: NeXT emulation?
Message-ID: <1991Apr21.140846.6087@cs.umu.se>
Date: 21 Apr 91 14:08:46 GMT
References: <91108.003225JBK4@psuvm.psu.edu> <holgerl.1337@amiux.UUCP>
Sender: news@cs.umu.se (News Administrator)
Organization: Dep. of Info.Proc, Umea Univ., Sweden
Lines: 19

>What bothers me more is this: When is the NeXT going to be able to emulate our
>beloved AMIGA ? Sure, there are the custom chips to be emulated, but after
>all the NeXT has an '040 in it... Speed of an emulated Amiga should be
>somewhat faster than a stock amiga, it might even reach the speed
>of an '020-Amiga. Of course it would require a Colorstation to emulate the
>color, but everything else should be possible on a normal NeXTstation.
>
>Best regards,
>Holger
>
I think the NeXT will have problems emulating HAM and sprites and dual
playfield and separate smooth-scroll/modulo for odd/even bitplanes
and separate bitplane pointers etc.
Also.. it's one thing to emulate programs that do ROM-calls for everything
but there are quite a lot of programs that write to the $DFF regs
perhaps the '040 could be instructed to cause an interrupt when it tries
to read/write an a specific area, then it would have to se which address
it was and perhaps change from 5 to 3 bitplanes in the middle of a scanline..
I don't think the NeXT could handle that.